1, this regulation is usually to ensure the water quality and ecological environment of the river, monitor and analyze the water body regularly, and grasp the status and changing trend of the river in time. The main stream and small and medium-sized rivers of a large water system are important parts of the water system, and their water quality and ecological environment have an important impact on the whole water system and the surrounding environment.
2. Sampling and monitoring these rivers for no less than 6 times throughout the year can timely grasp the water quality, water flow, aquatic organisms and other conditions of the rivers, as well as the pollution status and changing trends of the rivers. Specifically, the sampling and monitoring times throughout the year can be adjusted according to different situations.
3. For some important rivers or waters, the number of sampling and monitoring may need to be more, so as to grasp the situation more accurately. At the same time, the number of sampling and monitoring needs to be different in different seasons and different waters of rivers. For example, in the flood season or the period when the water quality changes greatly, it is necessary to increase the number of sampling and monitoring in order to better grasp the situation.
Significance of sampling and detection of water system
1. water quality assessment: through the detection of various indicators in water samples, we can understand the types and concentrations of pollutants in water, evaluate water quality, and judge its impact on human beings and ecosystems. Pollution source diagnosis: By analyzing the chemical composition of water samples, the main pollution sources can be diagnosed.
2. Monitoring ecological health: The health status of biological communities and ecosystems in water can be evaluated by analyzing biological indicators in water samples. For example, the number and species of plankton, fish and other aquatic organisms in water samples can reflect the ecological health of water bodies.
3. Prediction of environmental change: By analyzing the environmental indicators in water samples, the trend of environmental change can be predicted. For example, climate change and land use change may have an impact on water bodies, and these changes can be found in time by monitoring water samples. Formulate management measures: The analysis of water sample data can provide scientific basis for formulating water resources management measures.